Elevator.



No. 748,551. PATENTED DEC. 29, 1903. A. R. WILFEBY.

ELEVATOR.

APPLIGATION FILED MAY 6, 1903.

TNC Iiunms PEI'ERS cc PHOYO-LITHO WASHWGTON. u. c.

Patented December 29, 1903.

PATENT OFFICE.

ARTHUR R. WILFLEY, DENVER, COLORADO.

ELEVATOR.

:BPECIFIGATION forming part of Letters Patent No. 748,551, dated December 29, 1903.

Application filed May 6, 1903. eria]v No. 165,827. (No model.)

To aZZ whom it ntcty concern:

Be it known that I, ARTHUR R. WILFLEY, a citizen of the United States, and a resident of Denver, in the county of Denver and State of Colorado, have invented a new and useful Improvement in Elevators, of which the following is a specification.

My invention relates to an improvement in elevators, and more particularly to what is termed endless-belt elevators for elevating pulp, water, and the like.

My object, primarily, is to provide an elevator in which the belts are kept out of the water and dirt, so that they may be looked after, kept oiled and cleaned, and in good working order without the necessity of first gaining access to the interior of the box or casing and perhaps causing the stoppage of the elevator as a preliminary.

In short, my invention comprises an elevator of the character described in which the cups only are incased, while the chains are outside of the casing, where access to them may be readily gained at all times.

My invention further consists in certain novel features of construction and combinations of parts, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation. Fig. 2 is a view in front elevation or' at right angles thereto, and Fig. 3 is a plan View of one of the cups or buckets and cross-bars.

A represents the box or .casing of the elevator, which is disposed vertically, as indicated in Figs. 1 and 2. It is obvious that it might be on a slant; but the vertical position is preferred in the particular use to which it is my purpose to put my present invention, it being intended especially for use in connection with ore-concentrators. This box or casing has the usual boot at the bottom,where the material to be elevated collects and is provided with an outlet-spout 1 at a suitable position in the upper portion of the box or casing.

The elevator proper comprises a series of cross-bars 2 2, of greater length than the width of the box or casing, so that their ends protrude through guide-slots 3 3 in the opposite sides of the box or casing, as indicated in Fig. 2. These protruding ends of cross- I bars 2 2 are connected with the endless chains 4 4, and these endless chains are carried over the large sprocket-wheels 5 5 at the upper end of the elevator and the smaller sprocketwheels 6 5 at the boot or lower end, the purpose of which construction is to insure having the forward leads of the chains exactly vertical, as will be seen by reference to Fig. 1, and my object in preferring to have the chains vertical is to prevent any sag in the chains which would cause the cross-bars to drag against one side of .the slot, and thus create an objectionable amount of friction which can in this way be avoided. Deflecting-rollers 7 7 press against each chain just below the upper sprocket-Wheels, thus causing this desired perpendicularity of the chains and at the same time dropping the cups or buckets back, thereby securing a perfect discharge immediately above the spout 1.

The cross-bars each have a centrally-located jog or ofiset 8 where the cup or bucket 9 is bolted on, so that at the bottom or in the boot of the elevator the cup or bucket will dip deeper than the lowest point of the slot. If the cross-bars were straight,it will readily be seen that as soon as the water attained a sufficient height for the cups or buckets to dip full the water would commence to run out of the slot. By means of the jog or ofiset the cup or bucket always dips deeper than the slot.

From the foregoing it will be seen that the usual rollers at the top and bottom of the elevator are unnecessary,the wheels taking their place and guiding the cross-bars throughout their turning movement. In this way lateral play and vibration are also effectually precluded. Furthermore, and above all, the chains are kept out of the water and pulp where they may be looked after and kept oiled at any and all times with the least possible interruption or inconvenience.

Slight changes might of course be resorted to in the form and arrangement of the several parts described without departing from the spirit and scope of my invention, and hence I do not wish to limit myself to the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination witha box or casing having slotted sides, wheels opposite the upper fleeting-rollers bearing against the chains at pointsjust below the upper wheels and adapted to press the under side of the chains back under the upper wheels and at the same time insuring a perfect discharge of the buckets.

3. The combination with a box or casing having slotted sides, wheels and endless chains, of cross-bars extending through the slots and connected to the chains, said cross-bars having jogs or oifsets formed therein and buckets secured to said jogs or offsets.

4. The combination with a pair of shafts,

wheels thereon, and endless chains carried by said wheels,of cross-bars secured to the chains, buckets carried by the cross-bars and a box or casing through which the cross-bars extend.

5. The combination with a pair of shafts, wheels thereon, and endless chains carried by said wheels,of cross-bars secured to the chains, buckets carried by ,the cross-bars, deflectingrollers bearing against the chains and a box or casing through which the cross-bars extend.

6. The combination with a pair of shafts, wheels thereon, and endless chains carried by said wheels, of cross-bars carried by the endless chains, buckets carried by the cross-bars, and a box or casing through which the crossbars extend.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ARTHUR R. WILFLEY.

Witnesses:

E. .B. BADGER, M. A. DINSMORE. 

